Structuring the Document.c

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#define MAX_CHARACTERS 1005
#define MAX_PARAGRAPHS 5

struct word {
    char* data;
};

struct sentence {
    struct word* data;
    int word_count;//denotes number of words in a sentence
};

struct paragraph {
    struct sentence* data  ;
    int sentence_count;//denotes number of sentences in a paragraph
};

struct document {
    struct paragraph* data;
    int paragraph_count;//denotes number of paragraphs in a document
};
char* getUntil(char** stream, char delim){
    int i = 0;
    while((*stream)[i] != delim && (*stream)[i] != '\0') i++;
    
    if ((*stream)[i] == '\0'){
        return *stream;
    }
    (*stream)[i] = '\0';
    char* ret = *stream;
    *stream = &((*stream)[i + 1]);
    return ret;
}

// count number of delim characters in string
int numerate(char* p, char delim){
    int len = strlen(p);
    int sum = 0;
    for (int i = 0; i < len; i++){
        if (p[i] == delim) sum++;
    }
    return sum;
}

struct document get_document(char* text) {
    struct document doc;
    // initialize doc
    doc.paragraph_count = numerate(text, '\n') + 1;
    doc.data = malloc(doc.paragraph_count * sizeof(struct paragraph));
    
    char* currPg;
    char* currS;
    char* currW;
    
    // for each paragraph, count sentences and initialize sentences
    for (int i = 0; i < doc.paragraph_count; i++){
        currPg = getUntil(&text, '\n');
        doc.data[i].sentence_count = numerate(currPg, '.');
        doc.data[i].data = malloc(doc.data[i].sentence_count * sizeof(struct sentence));
        
        // for each sentence, count words and initialize words
        for (int j = 0; j < doc.data[i].sentence_count; j++){
            currS = getUntil(&currPg, '.');
            doc.data[i].data[j].word_count = numerate(currS, ' ') + 1; // plus one because last word
            doc.data[i].data[j].data = malloc(doc.data[i].data[j].word_count * sizeof(struct word));
            
            // for each word, initialize 
            for (int k = 0; k < doc.data[i].data[j].word_count; k++) {
                currW = getUntil(&currS, ' ');
                doc.data[i].data[j].data[k].data = currW;
            }
        }        
    }
    
    return doc;
}

struct word kth_word_in_mth_sentence_of_nth_paragraph(struct document Doc, int k, int m, int n) {
    return Doc.data[n - 1].data[m - 1].data[k - 1];
}

struct sentence kth_sentence_in_mth_paragraph(struct document Doc, int k, int m) { 
    return Doc.data[m - 1].data[k - 1];
}

struct paragraph kth_paragraph(struct document Doc, int k) {
    return Doc.data[k - 1];
}




void print_word(struct word w) {
    printf("%s", w.data);
}

void print_sentence(struct sentence sen) {
    for(int i = 0; i < sen.word_count; i++) {
        print_word(sen.data[i]);
        if (i != sen.word_count - 1) {
            printf(" ");
        }
    }
}

void print_paragraph(struct paragraph para) {
    for(int i = 0; i < para.sentence_count; i++){
        print_sentence(para.data[i]);
        printf(".");
    }
}

void print_document(struct document doc) {
    for(int i = 0; i < doc.paragraph_count; i++) {
        print_paragraph(doc.data[i]);
        if (i != doc.paragraph_count - 1)
            printf("\n");
    }
}

char* get_input_text() {	
    int paragraph_count;
    scanf("%d", &paragraph_count);

    char p[MAX_PARAGRAPHS][MAX_CHARACTERS], doc[MAX_CHARACTERS];
    memset(doc, 0, sizeof(doc));
    getchar();
    for (int i = 0; i < paragraph_count; i++) {
        scanf("%[^\n]%*c", p[i]);
        strcat(doc, p[i]);
        if (i != paragraph_count - 1)
            strcat(doc, "\n");
    }

    char* returnDoc = (char*)malloc((strlen (doc)+1) * (sizeof(char)));
    strcpy(returnDoc, doc);
    return returnDoc;
}

int main() 
{
    char* text = get_input_text();
    struct document Doc = get_document(text);

    int q;
    scanf("%d", &q);

    while (q--) {
        int type;
        scanf("%d", &type);

        if (type == 3){
            int k, m, n;
            scanf("%d %d %d", &k, &m, &n);
            struct word w = kth_word_in_mth_sentence_of_nth_paragraph(Doc, k, m, n);
            print_word(w);
        }

        else if (type == 2) {
            int k, m;
            scanf("%d %d", &k, &m);
            struct sentence sen= kth_sentence_in_mth_paragraph(Doc, k, m);
            print_sentence(sen);
        }

        else{
            int k;
            scanf("%d", &k);
            struct paragraph para = kth_paragraph(Doc, k);
            print_paragraph(para);
        }
        printf("\n");
    }     
}